For me I've tried out the same and worked out .Even i had the same issue with my s9+.not sure about the brightness level.check on your phone for which brightness level it's stable.
Hi RASUL786 ,this is due the liquid leak beneath the display panel. this is caused due to the pressure on the mobile screen.you turn of the auto display and try using mobile in different brightness levels and see where the screen doesn't have the gre...